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Finding the Fourth Proportional to 718,920.86, 992,103.94 and 396,633.56

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Solution

The fourth proportional to 718,920.86, 992,103.94 and 396,633.56 is: 547,350.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,920.86 : 992,103.94 = 396,633.56 : x
  2. Step 2: Convert to fraction form
    718,920.86/992,103.94 = 396,633.56/x
  3. Step 3: Cross multiply
    718,920.86x = 992,103.94 × 396,633.56
  4. Step 4: Simplify right side
    718,920.86x = 393,501,717,612.23
  5. Step 5: Solve for x
    x = 393,501,717,612.23/718,920.86
  6. Step 6: Final answer
    x = 547,350.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.